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Math Help - help please!

  1. #1
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    Exclamation help please!

    the reciprocal of 4 plus the reciprocal of 5 is the reciprocal of what number?

    please help.
    thanks.
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  2. #2
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by heather_meaghan View Post
    the reciprocal of 4 plus the reciprocal of 5 is the reciprocal of what number?

    please help.
    thanks.
    let the number be x. then we have

    \frac 14 + \frac 15 = \frac 1x now solve for x

    or you can simply add 1/4 and 1/5 and take the reciprocal of the answer
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  3. #3
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    thank you so much!
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